LIVE: Investigators announce results of Texas explosion probe

Investigators sift through the debris of the destroyed fertilizer plant in West, Texas, Thursday. Investigators face a slew of challenges in figuring out what caused the explosion at the fertilizer plant that killed 14 people and destroyed part of the small Texas town. (AP Photo/LM Otero, Pool)

Starting at 5 p.m., investigators will announce on Thursday the results of a probe into what caused last month’s fertilizer plant explosion in West, Texas, that killed 14 people and obliterated sections of the small town.